Watts 0121442 LF53L-125# 1/2″ Lead-Free Pressure Relief Valve

Description

Watts LF53L-125# 1/2″ Lead-Free Pressure Relief Valve

The Watts 0121442 LF53L-125# is a 1/2″ lead-free pressure relief valve engineered to protect hydronic heating systems, boilers, and plumbing equipment from dangerous overpressure conditions. With a factory-set relief pressure of 125 PSI, this valve automatically opens to discharge excess pressure and closes once safe operating levels are restored — providing dependable, hands-free system protection.

Key Features

• Lead-free (LF) construction for compliance with low-lead content regulations
• 1/2″ inlet connection for straightforward installation on standard piping
• Factory-set at 125 PSI relief pressure for consistent, reliable overpressure protection
• Automatic reset operation — opens under excess pressure and reseats when pressure normalizes
• Compact, durable design suited for residential and light commercial hydronic and plumbing applications
• Watts quality engineering for long service life and dependable performance

Specifications

• Brand: Watts
• Model: LF53L-125#
• SKU: 0121442
• Connection Size: 1/2″
• Set Pressure: 125 PSI
• Lead-Free Compliant: Yes

Applications

• Residential and commercial boiler systems
• Hydronic heating systems
• Domestic hot water and plumbing systems requiring overpressure protection
• Any closed-loop system requiring a reliable pressure relief device